Spied here is the next generation Audi A6 (Code: C6) test mule in Iasi, Romania. Going by a leaked official report of Audi a while back, it's rumored to be revealed Jan 2011.
The next-generation C7 A6 should employ an Aluminum Steel Space Frame, helping it shed significant amounts of weight, while enhancing the shell's rigidity by nearly 50%. This will improve handling, braking, fuel efficiency and not to forget, 0-60 times!.
Source - WCF